Temporarily disabling "Microphone access" centrally breaks access to Kõnele services

[Kaljurand]

Steps:

• disable Settings -> Security & privacy -> Privacy controls -> Microphone access (also possible via notification tiles)
• recognition now fails: mic button turns gray after being pressed but no error message is shown
• enable Microphone access again
• recognition still fails with no error message (however not when Google's service is used)

Rebooting the device fixes the issue.

TODO:

• show relevant error message if microphone access is disabled centrally (and grey out + disable the mic button)
• make sure recognition works if all the permissions have been granted

[Kaljurand]

Perhaps follow some of the best practices discussed in https://developer.android.com/training/permissions/explaining-access, e.g.

Wait to access the device's microphone until the user has granted the RECORD_AUDIO permission to your app.

Also, consider that

When the user turns off microphone access, your app receives silent audio.

and make sure Kõnele correctly deals with silent audio, e.g. when the Microphone access is temporarily disabled during a longer recording.